Depth

Question 1

Name the covalent bond between 2 adjacent amino acids (1)

Answer 1

Peptide bonds

Question 2

Describe the structure of a collagen molecule (6)

Answer 2

There are peptide bonds between amino acids whereby every 3rd amino acid is glycine.
Glycine allows twisting of polypeptide chains. There are 3 polypeptide chains that are held by hydrogen bonds